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02
Product description
02.01
General
In regions with high temperatures and high humidity,
there is a risk of condensation water forming on the
cooling surfaces of a embedded radiant cooling
system. In addition, too much humidity can have
negative effects on thermal comfort. For this reason,
it makes sense to reduce the humidity in rooms.
The DHU W-C 22 L dehumidifier was specially
developed for use in combination with REHAU
embedded radiant cooling system. The external
control of the unit is taken care of using the
REHAU control system NEA SMART 2.0.
02.02
Components
This dehumidifier has two modes:
1.
Air dehumidification
The air is dehumidified, whereby the temperature
at the inlet and outlet is almost the same.
2.
Air dehumidification with cooling
The air is dehumidified and additionally cooled.
The dehumidifier consists of an air filter, a refrigerant
circuit with two operating modes, a water circuit that
can be connected to the cooling circuit of the
embedded radiant cooling system, a fan and an
electronic unit.
The air filter ensures that the amount of dirt and dust
entering the machine is reduced. It must be cleaned
regularly. Please refer to chapter 04.04.
The water circuit, which can be connected to a
hydraulic circuit of the embedded radiant cooling
system, has two fin coil heat exchangers with air flow,
the pre-cooler and the post-cooler as well as a plate
heat exchanger.
The refrigerant circuit consists of the following
components:
A fin coil heat exchanger with air flow where the air is
dehumidified, is the evaporator of the refrigerant
circuit. The required energy is extracted from the
environment. This is the so-called cold area.
The compressor of the circuit is a hermetic
reciprocating piston compressor for building up the
pressure of the refrigerant.
Another fin coil heat exchanger with air flow or the
plate heat exchanger of the water circuit are the
condensers of the refrigerant circuit, depending on the
operating mode. Heat is released during this process.
This is the so-called warm area.
The pressure reduction in the refrigerant circuit is
realised by means of capillaries.
Two solenoid valves are used to switch between the
operating modes and a high-pressure switch is used to
monitor the pressure.
For monitoring and controlling the machine, there is an
electronic unit with microprocessor and display.
The microprocessor controls the defrosting phases as
well as switching on and off of the compressor, the fan
and the solenoid valves. It also monitors the signals
from the high-pressure switch and the thermostat on
the evaporator of the refrigerant circuit and triggers an
alarm if necessary.
07
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